- #1
holess
- 7
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Could you please give me an explanation about this (it should be a basic question): why a slit with the width less than a EM wave wavelength does not allow the wave to go through?
I know Hygen's interference rule but somehow I don't see that if the slit is less than a wavelength it completely stops a wave. I found everybody cites that, but nowhere the explicit explanation (should be a special case of Hygen). Probably I didn't read the right books.
One application of that is: because the diameters of the little holes on microwave oven doors are less than their wavelength, it stops the microwaves and allows the interior to be seen.
Thank you veru much.
Ho
I know Hygen's interference rule but somehow I don't see that if the slit is less than a wavelength it completely stops a wave. I found everybody cites that, but nowhere the explicit explanation (should be a special case of Hygen). Probably I didn't read the right books.
One application of that is: because the diameters of the little holes on microwave oven doors are less than their wavelength, it stops the microwaves and allows the interior to be seen.
Thank you veru much.
Ho